CVE-2026-55664

MEDIUMPre-NVD 4.34.3
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

This medium-severity CVE scores 4.3 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.3% (24th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from a secondary CVSS source
Sources: EPSS, a secondary CVSS source
4.3EG
EchelonGraph verdictMonitorRemediate within your standard update timelines (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 4.3Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Grist is spreadsheet software using Python as its formula language. Prior to 1.7.15, the GET /forms endpoint read table and column metadata without applying the document's access rules and did not check that the requested section was actually a form. A user with only partial read access, including public access on a publicly viewable document, could request the metadata of any widget and reveal table and column structure that access rules would otherwise hide, even in documents that contain no forms. This issue is fixed in version 1.7.15.

CVSS v3
4.3
EG Score
4.3MEDIUMmedium confidence
EG Risk
19
EG Risk 19/100

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed (value × EchelonGraph’s weight)
Severity43% × 45%
The EG Score, 4.3 of 10.
Exploitation0.3% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.3%
EPSS %ILE
24th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at every mission impact level.

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

July 10, 2026

Last Modified

July 13, 2026

Advisory Details (3)

Auto-updated Jul 10, 2026
Patch available. Sources: github_commit, github_release, github.
GitHub advisoryMentions a patch (unverified)

Insufficient access control in the /forms endpoint exposes table metadata · Advisory · gristlabs/grist-core · GitHub

https://github.com/gristlabs/grist-core/security/advisories/GHSA-w2hc-w6cg-xvh9
GitHub release Patch Available

v1.7.15

Patch available: gristlabs/grist-core v1.7.15

https://github.com/gristlabs/grist-core/releases/tag/v1.7.15
GitHub commit Patch Available

commit 14694156fe99 (gristlabs/grist-core)

Patch available: gristlabs/grist-core v1.7.15 (contains commit 14694156fe99)

https://github.com/gristlabs/grist-core/commit/14694156fe99c438c5f7a452ad367e933bb194db

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 11× in last 7d / 35× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 100 of 132 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 32 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  2. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  3. 2026-10-12 15:55 UTCEG score recompute
  4. 2026-10-11 19:38 UTCEG score recompute
  5. 2026-10-11 16:54 UTCEG score recompute
  6. 2026-10-11 14:16 UTCEG score recompute
  7. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  8. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  9. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  10. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  11. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  12. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  13. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  14. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  15. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  16. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  17. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  18. 2026-10-01 14:57 UTCEG score recompute
  19. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  20. 2026-09-29 15:22 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  21. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  22. 2026-09-28 09:45 UTCEG score recompute
  23. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  24. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  25. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
Show 75 more
  1. 2026-09-24 11:09 UTCEG score recompute
  2. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  3. 2026-09-23 05:43 UTCEG score recompute
  4. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  5. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  6. 2026-09-18 05:16 UTCEG score recompute
  7. 2026-09-17 19:31 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  8. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  9. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  10. 2026-09-15 03:11 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  11. 2026-09-14 08:33 UTCEG score recompute
  12. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  13. 2026-09-13 08:10 UTCEG score recompute
  14. 2026-09-12 02:31 UTCEG score recompute
  15. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  16. 2026-09-10 09:35 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  17. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  18. 2026-09-08 02:42 UTCEG score recompute
  19. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  20. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  21. 2026-09-05 21:40 UTCEG score recompute
  22. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  23. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  24. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  25. 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  26. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  27. 2026-08-30 06:04 UTCEG score recompute
  28. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  29. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  30. 2026-08-27 21:39 UTCEG score recompute
  31. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  32. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  33. 2026-08-26 08:16 UTCEG score recompute
  34. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  35. 2026-08-25 04:43 UTCEG score recompute
  36. 2026-08-23 03:56 UTCEG score recompute
  37. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  38. 2026-08-22 03:31 UTCEG score recompute
  39. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  40. 2026-08-21 02:03 UTCEG score recompute
  41. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  42. 2026-08-20 01:31 UTCEG score recompute
  43. 2026-08-19 17:04 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  44. 2026-08-18 22:33 UTCEG score recompute
  45. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  46. 2026-08-17 22:10 UTCEG score recompute
  47. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  48. 2026-08-16 20:30 UTCEG score recompute
  49. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  50. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  51. 2026-08-15 20:07 UTCEG score recompute
  52. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  53. 2026-08-14 19:41 UTCEG score recompute
  54. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  55. 2026-08-12 18:55 UTCEG score recompute
  56. 2026-08-12 13:51 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  57. 2026-08-11 18:32 UTCEG score recompute
  58. 2026-08-11 00:00 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  59. 2026-08-09 17:35 UTCEG score recompute
  60. 2026-08-09 13:46 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  61. 2026-08-08 17:12 UTCEG score recompute
  62. 2026-08-08 16:37 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  63. 2026-08-07 16:48 UTCEG score recompute
  64. 2026-08-06 16:25 UTCEG score recompute
  65. 2026-08-06 13:47 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  66. 2026-08-05 19:17 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  67. 2026-08-04 15:39 UTCEG score recompute
  68. 2026-08-04 15:10 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  69. 2026-08-04 10:39 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  70. 2026-08-03 15:16 UTCEG score recompute
  71. 2026-08-03 10:36 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  72. 2026-08-02 14:52 UTCEG score recompute
  73. 2026-08-02 02:27 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  74. 2026-08-01 14:29 UTCEG score recompute
  75. 2026-08-01 04:16 UTCEPSS rescoreEPSS 0.2% · 15th percentile

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-55664?
CVE-2026-55664 is a medium-severity vulnerability; its CVE record was published on July 10, 2026. Grist is spreadsheet software using Python as its formula language. Prior to 1.7.15, the GET /forms endpoint read table and column metadata without applying the document's access rules and did not check that the requested section was actually a form. A user with only partial read access, including…
When was the CVE record for CVE-2026-55664 published?
The CVE record for CVE-2026-55664 was published on July 10, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of July 13, 2026; the record at its source may have been updated since.
Is CVE-2026-55664 actively exploited?
CVE-2026-55664 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (24th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-55664?
CVE-2026-55664 has a CVSS base score of 4.3 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-55664?
A fix for CVE-2026-55664 is available: update to the fixed version the vendor names in its advisory.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-55664

Explore →

Is Your Infrastructure Affected by CVE-2026-55664?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Book a Demo →Browse All CVEs